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David Tomasko

  • Assc Dean, Undergrad Edc & Srv, COE Undergrad Educ/Std Svcs
  • Professor, Chemical & Biomolecular Eng
  • 486 CBEC
    151 W. Woodruff Ave.
    Columbus, OH 43210
  • 614-247-6548

About


Education

  • B.S., University of Tulsa, 1986
  • M.S., University of Illinois, 1990
  • Ph.D., University of Illinois, 1992

 

Key Honors and Distinctions

  • OSU Alumni Award for Distinguished Teaching, 2002

 

RESEARCH AREAS - Tomasko Lab for Thermodynamics, Separations, and Materials Processing
  • Thermodynamics, Separations, and Materials Processing.
  • All graduate student research positions are currently filled. 
  • PUBLICATIONS

The theme of my research is to promote the use of environmentally benign solvents in chemical and materials processing. Our current focus is the application of supercritical fluids (SCFs) to separations and the processing of polymers, foods, and pharmaceuticals. As shown schematically below, these fluids lie somewhere between gases and liquids and have very desirable transport and thermodynamic properties for infusing/ extracting organics into/from complex matrices. The necessary tools in this work include phase equilibrium thermodynamics, mass transport in compressible fluids, physical organic chemistry, and spectroscopic analysis. 

Research opportunities in separations are numerous and provide an excellent area in which to bring together many disciplines, including chemical engineering, civil engineering, and industrial chemistry. Our goal in this area is to develop new technologies for the difficult separations encountered in environmental clean-up and isomer purification. 

SCFs can dissolve into and swell polymeric matrices as efficiently as liquid organic swelling agents with the advantage that they are easier to separate from the polymer after processing. This has the effect of reducing the Tg and melt viscosity of the polymer and allows us to incorporate additives into polymers using a supercritical fluid as a carrier. We can, for example, change the color, wettability, or density of a polymer by swelling and impregnating with an SCF solvent. We can also dramatically alter the polymer blending process in an extruder. This area involves mass transport and thermodynamics of highly asymmetric, complex molecular systems and incorporates both experimental and computational components. 

Finally, SCFs are applied to separating and crystallizing thermally labile compounds, such as foods and pharmaceuticals. In this work, we are interested in all aspects of pharmaceutical crystallization with emphasis on using supercritical fluid solvents as the crystallizing medium. Techniques include rapid expansion of supercritical solutions in which expansion through a capillary sets up a standing shock wave to initiate nucleation from the expanded gas, and gas antisolvent crystallization where the SCF is used as an antisolvent to precipitate particles out of a liquid solution. This work includes projects in nucleation and growth, phase equilibrium, and thermodynamic modeling of pharmaceutical solubility.

 

Honors

  • 20100101

    Faculty Diversity Excellence Award.

  • 20100101

    Commencement Speaker, 394th Commencement of The Ohio State University.

  • 20080101

    Lumley Engineering Research Award.

  • 20050101

    Exemplary Service Award.

  • 20040101

    Charles E. MacQuigg Award for Outstanding Teaching.

  • 20040101

    Ralph L. Boyer Award for Outstanding Teaching.

  • 20030101

    Lumley Engineering Research Award.

  • 20020101

    Lumley Award for Interdisciplinary Research.

  • 20020101

    Alumni Award for Distinguished Teaching.

  • 19990101

    Charles E. MacQuigg Award for Outstanding Teaching.

  • 19980101

    Lumley Engineering Research Award.

  • 19980101

    Best Paper Award.

  • 19980101

    Maro Publications Future Technology Award for special achievement in research of future developments in the field of polymers.

  • 19920101

    NSF Post-doctoral Grant.

  • 19880101-19890101

    Amoco Foundation Fellowship.

  • 19870101-19880101

    General Electric Fellowship.

  • 19860101-19870101

    Union Carbide Fellowship.

  • 19860101

    W.L. Nelson Award for Outstanding Achievement in Chemical Engineering.

  • 19850101

    Tau Beta Pi.

Presentations

  • "Adsorption of and from Supercritical Carbon Dioxide on Microporous Materials." 2000, Presented at 5th International Symposium on Supercritical Fluids,
  • "Bioactive polymer surfaces via supercritical fluids." 2002, Presented at 8th Meeting on Supercritical Fluids,
  • "Novel Polymer/Clay Nanocomposite Foams Synthesized by Supercritical CO2." 2003, Presented at AIChE Annual Meeting,
  • "Supercritical Fluid Processing for Functional Biomaterials." 2005, Presented at 3rd International Symposium on Biomaterials and Biomechanics,
  • "Supercritical Fluid Assisted Polymer Blending." 1998, Presented at 8th International Symposium on Supercritical Fluids,
  • "Adsorption of and from Supercritical Carbon Dioxide on Microporous Materials." 2000, Presented at Midwest Thermodynamics and Statistical Mechanics Conference,
  • "Adsorption Behavior of Supercritical Carbon Dioxide on Microporous Materials." 2000, Presented at Central Region American Chemical Society Meeting,
  • "Supercritical Fluid Applications in Polymer Processing." 2000, Presented at Ashland Technical Forum,
  • "Spectroscopic Characterization of Supercritical Fluid Impregnation of Polymers." 2000, Presented at Central Region American Chemical Society Meeting,
  • "Supercritical Fluid Assisted Polymer Processing: Novel Blends and Foams." 2001, Presented at 10th International Symposium on Supercritical Fluid Chromatography, Extraction, and Processing,
  • "Supercritical carbon dioxide foaming and impregnation of polymers." 2002,
  • "Foam Extrusion of Polystyrene and its Nanocomposites Using Supercritical CO2." 2002, Presented at AIChE Annual Meeting,
  • "Carbon Dioxide Assisted Processing of Polymer Nanocomposites." 2004, Presented at 27th RACI Australian Polymer Symposium,
  • "Rotational Rheometry of Polymers under Carbon Dioxide." 2006, Presented at AIChE Annual Meeting,
  • "Materials Processing with Supercritical Fluids I: Processing in the Solid Phase." 1997,
  • "Lab-on-a-chip Design-Build Project in a First-Year Engineering Course." 2006, Presented at AIChE Annual Meeting,
  • "Gluing Nanopatterned Polymers with CO2: Reversible Surface Tg Reduction of Polymers." 2006,
  • "Applications of Supercritical Fluids - Just how much can we do with pure CO2?." 1994, Presented at Combined Meeting of Central Ohio Sections of AIChE, ACS, and Electrochemical Society,
  • "Supercritical Technology for Impregnation of Synthetic Materials." 1996,
  • "Applications of Supercritical Fluids to Materials Processing." 1996,
  • "Investigation of the influence of injecting pressurized CO2 on the hot melt extrusion process and the extrudate properties of Eudragit E100." 2004, Presented at 12th Forum of Pharmaceutical Sciences,
  • "Engaging Engineering Students." 2004, Presented at Teaching Excellence Conference,
  • "Carbon Dioxide Effects on Surface Tg and Implications for Processing." 2004, Presented at 11th International Symposium on Supercritical Fluid Chromatography, Extraction, and Processing,
  • "Rheological Studies of Polymers Under High Pressure CO2." 2005, Presented at Proceedings of 7th International Symposium on Supercritical Fluids,
  • "Supercritical Fluid Processing for Functional Biomaterials: Some Medical Applications." 2005, Presented at 3rd International Symposium on Advanced Biomaterials/Biomechanics,
  • "CO2-Assisted Surface Modification of Polymers with Antibodies Based on Surface Tg Reduction." 2005, Presented at Proceedings of 7th International Symposium on Supercritical Fluids,
  • "CO2-induced Plasticization and Viscosity Reduction in Pharmaceutical Polymers." 2005, Presented at Proceedings of 7th International Symposium on Supercritical Fluids,
  • "CO2-Induced Plasticization and Viscosity Reduction in Pharmaceutical Polymers." 2005, Presented at AIChE Annual Meeting,
  • "Rheological Changes in CO2 Impregnated Polymers Reinforced with Nanoclays." 2003, Presented at SPE-ANTEC,
  • "The Role of Interfacial Tension in CO2 Assisted Polymer Extrusion Process." 2003, Presented at Midwest Thermodynamics and Statistical Mechanics Conference,
  • "Extrusion of Polystyrene Foams Reinforced with Nano-Clays." 2003, Presented at SPE-ANTEC,
  • "Gas Enhanced Interfacial Bonding of Polymers at the Micro/Nanoscale." 2003, Presented at AIChE Annual Meeting,
  • "Analysis of morphology development in the CO2 - assisted polymer blending process." 2003, Presented at AIChE Annual Meeting,
  • "Investigation of Polymer Surface Dynamics under CO2." 2004, Presented at AIChE Annual Meeting,
  • "Biologically Benign Three-Dimensional Assembly of Polymer Structures at the Nanoscale Using CO2." 2004, Presented at AIChE Annual Meeting,
  • "CO2 as a Blowing Agent in Polymer Nanocomposite Foams." 2004,
  • "Investigation of Polymer Surface Dynamics under CO2 using Atomic Force Microscopy." 2004, Presented at 20th Annual Meeting of the Polymer Processing Society – PPS-20,
  • "Phase Behavior and Tg in CO2 – Polymer Systems." 2004, Presented at AIChE Annual Meeting,
  • "Adsorption Behavior of Supercritical Carbon Dioxide on Microporous Materials." 2002,
  • "Structure of nanocomposite foams." 2002, Presented at SPE-ANTEC,
  • "Processing and cell structure of nano-clay modified microcellular foams." 2002, Presented at SPE-ANTEC,
  • "Influences of solubility and viscosity in the polystyrene/CO2 microcellular foaming extrusion." 2002, Presented at SPE-ANTEC,
  • "Polymer/Clay Nanocomposite Foams Prepared by CO2." 2003, Presented at SPE-ANTEC,
  • "Understanding and Exploiting Tg Reduction for Surface and Bulk Modification of Polymers with CO2." 2005, Presented at 10th European Meeting on Supercritical Fluids,
  • "Dynamics of Nanocomposite Foams using Carbon Dioxide." 2006, Presented at Proceedings of the 8th International Symposium on Supercritical Fluids,
  • "Foaming Using a Polystyrene / Poly(methyl methacrylate) Blend and Nanocomposites." 2006, Presented at AlChE Annual Meeting,
  • "Density Functional Approach for Modelling Polymer-CO2 Interfaces." 2006, Presented at AIChE Annual Meeting,
  • "Role of CO2 in Surface Tg Reduction of Polymers." 2006, Presented at AlChE Annual Meeting,
  • "Role of CO2 in Surface Tg Reduction of Polymers." 2006, Presented at Proceedings of the 8th International Symposium on Supercritical Fluids,
  • "CO2 and Drug-Induced Plasticization and Viscosity Reduction in Pharmaceutical Polymers." 2006, Presented at AAPS Annual Meeting,
  • "Environmentally Benign Crystallization: Compressed Fluids as Separable and Recoverable Antisolvents." 1997,
  • "Supercritical Fluid Processing of Pharmaceuticals." 1998,
  • "Supercritical Fluid Applications in Polymer Processing." 1999,
  • "Adsorption Behavior of Supercritical Fluids on Microporous Materials." 2000,
  • "Supercritical Fluid Applications in Polymeric Materials Processing." 2000,
  • "Piggybacking Chemotherapeutic Function onto Biomedical Implants via Carbon Dioxide Treatment." 2005, Presented at Proceedings of 7th International Symposium on Supercritical Fluids,
  • "“Supercritical Fluid Applications in Polymeric Materials Processing." 2000,
  • "Environmental Applications of Supercritical Fluids." 1994, Presented at ACE Day Program,
  • "The role of CO2 in Enhancing Polymer Extrusion." 2003, Presented at 6th International Symposium on Supercritical Fluids,
  • "CO2 as a Blowing Agent in Nanocomposite Systems – Thermodynamics and Rheology - Polymer-Supercritical Fluid Systems and Foams." 2003, Presented at International Workshop on Supercritical Fluid Aided Polymer and Foam Processing,
  • "Investigation of the influence of injecting pressurized CO2 on the hot melt extrusion process and the extrudate properties of PVP-VA 64." 2004, Presented at 8th Meeting on Supercritical Fluids,
  • "Investigation of the influence of injecting pressurized CO2 on the hot melt extrusion process and the extrudate properties of itraconazole with PVP-VA 64." 2005, Presented at Proceedings of 7th International Symposium on Supercritical Fluids,
  • "Interfacial Tension between Polystyrene (PS) and SC CO2." 2002, Presented at Midwest Thermodynamics and Statistical Mechanics Conference,
  • "Thermodynamic and Glass Transition Behavior in CO2 – Polymer Systems Emphasizing the Surface Region." 2006, Presented at Midwest Thermodynamics and Statistical Mechanics Meeting,
  • "Polymer Scaffolds foamed with CO2 for Tissue Engineering Applications." 2002, Presented at AIChE Annual Meeting,
  • "Interfacial Tension of Polystyrene/CO2 Systems." 2002, Presented at AIChE Annual Meeting,
  • "Solute-Solute Effects in Supercritical Fluid Processing of Biomolecules." 1995,
  • "Applications of Supercritical Fluids to Materials Processing." 1997,
  • "Carbon Dioxide-Enhanced Polymer Compounding - Supercritical Fluids in Materials Processing and Synthesis." 1999, Presented at Engineering Foundation Conference,
  • "Carbon Dioxide-Enhanced Polymer Compounding." 1999,
  • "Microfabricated Polymer Blends for the Study of CO2 Foaming." 2004, Presented at AIChE Annual Meeting,
  • "Gluing Nanopatterned Polymers with CO2: Reversible Surface Tg Reduction of Polymers." 2007,
  • "A Novel Fabrication Technique for Polymeric Lab-on-a-chip Devices Containing an Immobilized Enzyme." 2008, Presented at 16th Simpósio Internacional De Iniciação Cientrifica Da Universidade De São Paulo,

Papers in Proceedings

2007

  • Guo Z., Lee, L.J. and Tomasko, D.L. "CO2 and Water Vapor Permeability in Polymer Nanocomposites and Foams." in Proceedings of SPE ANTEC. (1 2007).

2006

  • Kalish, A., Tomasko, D.L., Masty, J., Acker, S., Rudmann, S., Forbush, J. "Electronic Course Portfolios for Peer-Evaluation of Teaching." in Proceedings of ASEE Annual Conference. (1 2006).
  • Liu, D., Yang, Y., Kusaka, I., Tomasko, D.L., Lee, L.J. "Role of CO2 in Surface Tg Reduction of Polymers." in Proceedings of the 8th International Symposium on Supercritical Fluids. (1 2006).
  • Allam, Y., Tomasko, D.L., Merrill, J., Trott, B., Schlosser, P., Clingan, P. "Lab-on-a-chip Design-Build Project with a Nanotechnology Component in a Freshman Engineering Course." in Proceedings of ASEE Annual Conference. (1 2006).
  • Clingan, P., Tomasko, D.L., Merrill, J., Allam, Y. "Work in Progress: Micro-/Nano-Technology ‘Lab-on-a-chip’ Research Project for First-Year Honors Engineering Program." in 36th Annual Frontiers in Education Conference. (1 2006).
  • Wingert, M.J., Guo, Z., Shen, J., Lee, L.J., Tomasko, D.L., Koelling, K.W. "Dynamics of Nanocomposite Foams using Carbon Dioxide." in Proceedings of the 8th International Symposium on Supercritical Fluids. (1 2006).

2005

  • Tomasko, D.L., Koelling, K.W., Lee, L.J., Han, X., Zeng, C., Wingert, M.J., Liu, D. "Polymer Nanocomposite Foams: Effect of Clay Surface Modification on Foam Structure." in NSF Grantees Conference. (1 2005).
  • Allam, Y., Tomasko, D.L., Merrill, J., Stevenson, P., Yang, Y., Wilson, T. "Lab-on-a-chip’ Micromanufacturing with a Nanotechnology Component for a First-Year Engineering Program: Implementation Results." in 35th Annual Frontiers in Education Conference. (1 2005).
  • Tomasko, D.L., Liu, D., Yang, Y., Lee, L.J., Lannutti, J.J., Verreck, G., Arien, T., Brewster, M. "Understanding and Exploiting Tg Reduction for Surface and Bulk Modification of Polymers with CO2." in Proceedings of 10th European Meeting on Supercritical Fluids. (12 2005).

2004

  • Liu, D., Li, H., Wingert, M.J., Koelling, K.W., Lee, L.J., Tomasko, D.L. "Polymer Nanocomposite Foams Prepared by Environmentally Benign Carbon Dioxide." in NSF Grantees Conference. (1 2004).
  • Tomasko, D.L., Merrill, J., Stevenson, P., Schofield, T., Yang, Y., Allam, Y., Brand, S. "Work in Progress – ‘Lab-on-a-chip’ Micromanufacturing with a Nanotechnology Component for a First-Year Engineering Program." in Proceedings of 34th Annual Frontiers in Education Conference. (1 2004).
  • Han, X., Zeng, C., Wingert, M.J., Liu, D., Koelling, K.W., Lee, L.J., Tomasko, D.L. "Polymer Nanocomposite Foams: Effect of Clay Surface Modification on Foam Structure." in Proceedings of 27th Australasian Polymer Symposium. (1 2004).
  • Yang, Y., Liu, D., Lee, L.J., Tomasko, D.L. "Investigation of Polymer Surface Dynamics under CO2 using Atomic Force Microscopy." in Proceedings of 20th Annual Meeting of the Polymer Processing Society – PPS-20. (1 2004).
  • Verreck, G., Li., H., Ariën, A., Peeters, J., Tomasko, D., Van den Mooter, G., Brewster, M. "Investigation of the influence of injecting pressurized CO2 on the hot melt extrusion process and the extrudate properties of PVP-VA 64." in Proceedings of 8th Meeting on Supercritical Fluids. (1 2004).

2003

  • Tomasko, D.L., Koelling, K.W., Lee, L.J., Han, X., Zeng, C., Li "CO2 as a Blowing Agent in Nanocomposite Systems – Thermodynamics and Rheology." in Polymer-Supercritical Fluid Systems and Foams. (12 2003).
  • Li, H., Han, X., Wingert, M.J., Lee, L.J., Koelling, K.W., Tomasko, D.L. "The Role of CO2 in Enhancing Polymer Extrusion Processes." in Proceedings of the 6th International Symposium on Supercritical Fluids. (1 2003).

2002

  • Han, X., Baxter, A.R., Koelling, K.W., Tomasko, D.L., Lee, L.J. "Influences of solubility and viscosity in the polystyrene/CO2 microcellular foaming extrusion." in Proceedings of SPE-ANTEC. (1 2002).
  • Zeng, C., Han, X., Lee, L.J., Koelling, K.W., Tomasko, D.L. "Structure of nanocomposite foams." in Proceedings of SPE-ANTEC. (1 2002).
  • Han, X., Zeng, C., Lee, L.J., Tomasko, D.L., Koelling, K.W. "Polymer Nanocomposite Foams by Using Supercritical CO2." in Proceedings of 18th Annual Meeting of the Polymer Processing Society – PPS-18. (1 2002).
  • Han, X., Zeng, C., Lee, L.J., Koelling, K.W., Tomasko, D.L. "Processing and cell structure of nano-clay modified microcellular foams." in Proceedings of SPE-ANTEC. (1 2002).
  • Tomasko, D.L., and Lee, L.J. "Phase Inversion in sCO2 Enhanced Polymer Blending." in NSF Grantees Conference. (1 2002).

2001

  • Elkovitch, M., Lee, L.J., Tomasko, D.L "Supercritical Carbon Dioxide Assisted Polymer Blending in Twin-Screw Extrusion: Phase Inversion, Morphology, and Mechanical Properties." in Proceedings of SPE-ANTEC. (1 2001).
  • Han, X., Koelling, K.W., Tomasko, D.L., Lee, L.J. "Process Optimization in Microcellular Foam Extrusion." in Proceedings of SPE-ANTEC. (1 2001).

2000

  • Tomasko, D.L., Wang, Y., Yang, C. "Supercritical Fluid Impregnation of Surfactant-Like Probes into Polypropylene and Poly(methyl methacrylate) Films." in Proceedings of the 5th International Symposium on Supercritical Fluids. (4 2000).
  • Kim, J., Tomasko, D.L., Ruan, S., Lannutti, J., Mariotti, A., Rumpf, D. "Supercritical Processing of Synthetic Biomaterials." in Proceedings of the 5th International Symposium on Supercritical Fluids. (4 2000).
  • Tomasko, D.L., Elkovtich, M.D., Lee, L.J. "Supercritical Carbon Dioxide Assisted Polymer Blending in Twin Screw Extrusion: Relations Between Morphology Evolution and Mechanical Properties." in Proceedings of the 5th International Symposium on Supercritical Fluids. (4 2000).
  • Humayun, R., Tomasko, D.L, Brueggemeier, S.B. "Adsorption of and from Supercritical Carbon Dioxide on Microporous Materials." in Proceedings of the 5th International Symposium on Supercritical Fluids. (4 2000).

1997

  • Chou, Y.-H., Tomasko, D.L. "GAS Crystallization of Polymer-Pharmaceutical Composite Particles." in Proceedings of 4th International Symposium on Supercritical Fluids. (1 1997).

1994

  • Bakshi, B.R., Koelling, K.W., Tomasko, D.L. "Chemical Engineering - Moving forward in traditional process engineering and emerging technologies." in Engineering Horizons. (1 1994).